Subdivision packing a punch (9)

I believe the answer is:

armstrong

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'subdivision packing a punch' is the definition.
I can't tell whether this definition defines the answer.

'subdivision packing a punch' is the wordplay.
'subdivision' becomes 'arm' (synonyms).
'packing a punch' becomes 'strong' (I've seen this in another clue).
'arm'+'strong'='ARMSTRONG'

Can you help me to learn more?

(Other definitions for armstrong that I've seen before include "Neil ........., first man on the moon" , "trumpet player" , "Jazz legend" , "See 25" , "jazz trumpeter" .)

I've seen this clue in the Sydney Morning Herald.

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